[Security] Bump puma from 3.12.6 to 4.3.8

[dependabot-preview]

Bumps puma from 3.12.6 to 4.3.8. This update includes a security fix.

Vulnerabilities fixed

Sourced from The GitHub Security Advisory Database.

Keepalive Connections Causing Denial Of Service in puma This vulnerability is related to CVE-2019-16770.

Impact

The fix for CVE-2019-16770 was incomplete. The original fix only protected existing connections that had already been accepted from having their requests starved by greedy persistent-connections saturating all threads in the same process. However, new connections may still be starved by greedy persistent-connections saturating all threads in all processes in the cluster.

A puma server which received more concurrent keep-alive connections than the server had threads in its threadpool would service only a subset of connections, denying service to the unserved connections.

Patches

This problem has been fixed in puma 4.3.8 and 5.3.1.

Workarounds

Setting queue_requests false also fixes the issue. This is not advised when using puma without a reverse proxy, such as nginx or apache, because you will open yourself to slow client attacks (e.g. slowloris).

The fix is very small. A git patch is available here for those using unsupported versions of Puma.

For more information

... (truncated)

Affected versions: <= 4.3.7

Release notes

Sourced from puma's releases.

v4.3.8

• Security
  • Close keepalive connections after the maximum number of fast inlined requests (#2625)

v4.3.6

puma/puma@v4.3.5...4.3.6

A quick fix for a build error on Mac OS and a JSON require fix for those using phased restart.

• Explicitly include ctype.h to fix compilation warning and build error on macOS with Xcode 12 (#2304)
• Don't require json at boot (#2269)

v4.3.0 - Mysterious Traveller

Mysterious Traveller

• Features

  • Strip whitespace at end of HTTP headers (#2010)
  • Optimize HTTP parser for JRuby (#2012)
  • Add SSL support for the control app and cli (#2046, #2052)

• Bugfixes

  • Fix Errno::EINVAL when SSL is enabled and browser rejects cert (#1564)
  • Fix pumactl defaulting puma to development if an environment was not specified (#2035)
  • Fix closing file stream when reading pid from pidfile (#2048)
  • Fix a typo in configuration option --extra_runtime_dependencies (#2050)

4.2.1

• 3 bugfixes
  • Fix socket activation of systemd (pre-existing) unix binder files (#1842, #1988)
  • Deal with multiple calls to bind correctly (#1986, #1994, #2006)
  • Accepts symbols for verify_mode (#1222)

4.2.0 - Distant Airhorns

• 6 features
  • Pumactl has a new -e environment option and reads config/puma/.rb config files (#1885)
  • Semicolons are now allowed in URL paths (MRI only), useful for Angular or Redmine (#1934)
  • Allow extra dependencies to be defined when using prune_bundler (#1105)
  • Puma now reports the correct port when binding to port 0, also reports other listeners when binding to localhost (#1786)
  • Sending SIGINFO to any Puma worker now prints currently active threads and their backtraces (#1320)
  • Puma threads all now have their name set on Ruby 2.3+ (#1968)
• 4 bugfixes
  • Fix some misbehavior with phased restart and externally SIGTERMed workers (#1908, #1952)
  • Fix socket closing on error (#1941)
  • Removed unnecessary SIGINT trap for JRuby that caused some race conditions (#1961)
  • Fix socket files being left around after process stopped (#1970)
• Absolutely thousands of lines of test improvements and fixes thanks to @​MSP-Greg

... (truncated)

Changelog

Sourced from puma's changelog.

4.3.8 / 2021-05-11

• Security
  • Close keepalive connections after the maximum number of fast inlined requests (#2625)

4.3.7 / 2020-11-30

• Bugfixes
  • Backport set CONTENT_LENGTH for chunked requests (Originally: #2287, backport: #2496)

4.3.6 / 2020-09-05

• Bugfixes
  • Explicitly include ctype.h to fix compilation warning and build error on macOS with Xcode 12 (#2304)
  • Don't require json at boot (#2269)

Commits

• b911c13 4.3.8 release note
• 09bb777 Bump version constant
• 8088950 Close keepalive connections after MAX_FAST_INLINE requests
• f3c95af 4.3.7
• 77a90ec Backport set CONTENT_LENGTH for chunked requests (#2496)
• a418e5c Updates to 4.3.6 to pass CI, adds Ubuntu 20.04 [changelog skip] (#2380)
• 3e3647a v4.3.6
• 73cfdf5 Merge pull request #2314 from venables/fix-include
• fa54f4d Merge pull request #2269 from MSP-Greg/json-require
• a24b51b Bump version
• Additional commits viewable in compare view

Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting @dependabot rebase.

---

Dependabot commands and options

You can trigger Dependabot actions by commenting on this PR:

• @dependabot rebase will rebase this PR
• @dependabot recreate will recreate this PR, overwriting any edits that have been made to it
• @dependabot merge will merge this PR after your CI passes on it
• @dependabot squash and merge will squash and merge this PR after your CI passes on it
• @dependabot cancel merge will cancel a previously requested merge and block automerging
• @dependabot reopen will reopen this PR if it is closed
• @dependabot close will close this PR and stop Dependabot recreating it. You can achieve the same result by closing it manually
• @dependabot ignore this major version will close this PR and stop Dependabot creating any more for this major version (unless you reopen the PR or upgrade to it yourself)
• @dependabot ignore this minor version will close this PR and stop Dependabot creating any more for this minor version (unless you reopen the PR or upgrade to it yourself)
• @dependabot ignore this dependency will close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself)
• @dependabot use these labels will set the current labels as the default for future PRs for this repo and language
• @dependabot use these reviewers will set the current reviewers as the default for future PRs for this repo and language
• @dependabot use these assignees will set the current assignees as the default for future PRs for this repo and language
• @dependabot use this milestone will set the current milestone as the default for future PRs for this repo and language
• @dependabot badge me will comment on this PR with code to add a "Dependabot enabled" badge to your readme

Additionally, you can set the following in your Dependabot dashboard:

• Update frequency (including time of day and day of week)
• Pull request limits (per update run and/or open at any time)
• Automerge options (never/patch/minor, and dev/runtime dependencies)
• Out-of-range updates (receive only lockfile updates, if desired)
• Security updates (receive only security updates, if desired)

[dependabot-preview]

Dependabot tried to update this pull request, but something went wrong. The most likely cause is #2140, which may be blocking Dependabot from updating your dependency files.

[dependabot-preview]

Dependabot tried to update this pull request, but something went wrong. The most likely cause is #2144, which may be blocking Dependabot from updating your dependency files.

[dependabot-preview]

Dependabot tried to update this pull request, but something went wrong. The most likely cause is #2147, which may be blocking Dependabot from updating your dependency files.

[dependabot-preview]

Dependabot tried to update this pull request, but something went wrong. The most likely cause is #2156, which may be blocking Dependabot from updating your dependency files.

[dependabot-preview]

Dependabot tried to update this pull request, but something went wrong. The most likely cause is #2158, which may be blocking Dependabot from updating your dependency files.

[dependabot-preview]

Dependabot tried to update this pull request, but something went wrong. The most likely cause is #2165, which may be blocking Dependabot from updating your dependency files.

[dependabot-preview]

Dependabot tried to update this pull request, but something went wrong. The most likely cause is #2172, which may be blocking Dependabot from updating your dependency files.